Hybrid motor driven power steering system for commercial vehicle and method of improving performance and fuel efficiency through control thereof
US8903609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Feb 15, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hybrid motor driven power steering system for a commercial vehicle may include a MDPS unit to generate motor output torque depending on driver steering torque, an EHPS unit to generate hydraulic output torque considering the motor output torque of the MDPS unit, a ball nut type gear box to generate output torque which operates a tie rod leading to left and right wheels after being input with the driver steering torque, the motor output torque, and the hydraulic output torque, and two torsion bars to block torque fluctuation rates at respective regions of a joint by detecting a road surface reaction force transferred to a steering column through the ball nut type gear box in at least two different positions. Accordingly, it may be possible to provide a steering capacity required in small-sized, medium-sized and full-sized commercial vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.